Redwood Sorrel

The Redwood Sorrel (Oxalis oregana) occurs from Vancouver Island south to northern California.
It makes a beautiful groundcover in moist, shady areas.
We photographed it at Van Dusen Botanical Garden in Vancouver where it forms a carpet under Rhododendrons.
The leaves have a sour taste, which indicates the presence of oxalic acid.
Although edible it should only be consumed in small quantities since it could cause kidneystones.

The camera recorded the following information in the original image file: